IN CHARGE:  Charl Schwartzel during round one of the  Thailand Golf Championship on Thursday. Picture: AFP PHOTO/KHALID REDZA/ASIAN TOUR
IN CHARGE: Charl Schwartzel during round one of the Thailand Golf Championship on Thursday. Picture: AFP

CHONBURI — Charl Schwartzel banished the injury woes that have marred his season to take the overnight lead at the Thailand Golf Championship on Thursday, galvanising his bid to better last year’s second place to Lee Westwood.

The 2011 Masters champion hit seven birdies in a flawless 65 in steamy conditions at the Amata Spring course as he appeared to be over the rib injury that has seen his form dip alarmingly this season.

Leading the chasing pack was home star Thitiphun Chuayprakong, who said a new coach working on the mental side of his game had fuelled his promising 66, while surprise packages Daniel Chopra and Javi Colomo finished one behind at five under.

"I’m just playing injury-free … that’s allowing me to swing the club much better. My consistency is coming back and that’s the key for me," said South African Schwartzel, who has not claimed a title since his Augusta win.

"When you are playing with injury, you always try to protect the injury and the consequence is a bad swing," he said.

Masters champion Bubba Watson led a clutch of players on four under, defying the furnace-like mid-morning temperatures and teasing the crowd with a glimpse of his renowned buccaneering "Bubba Golf", by holing a birdie, eagle, then birdie after the turn.

"It was a solid round, but I made a few mistakes," said the left-handed American, adding the winner will have to "beat the heat" as well as the high-class field.

Ryder Cup winner Sergio Garcia returned to the clubhouse with a three-under 69, with wayward putting on the back nine derailing what looked set to be a challenge for the overnight lead.

"Hopefully I can play a little bit better tomorrow and shoot a good score and get myself in a good position for the weekend," the Spaniard said.

It was a frustrating day for defending champion Westwood, who had said he was capable of repeating a miraculous first-round 60 that spurred his 2011 victory, but found his putting let him down, to send him in at two under.

A bogey at the last took the sheen off a solid, if unspectacular, round from the world No6, and he was clearly unhappy with his effort as he trudged into the clubhouse without speaking to waiting reporters.

As the sun dipped beneath the palmtree-lined course there was plenty of cheer for local fans, with Thitiphun joined by veterans Thaworn Wiratchant — who leads the Asian Tour Order of Merit — and Thongchai Jaidee very much in the chase, at three under.

"It’s a home course for us," said a delighted Thongchai after a thrilling back nine that included four birdies, the pick of them an audacious chip in at the thirteenth.

"We have a lot of support here, so we’re all relaxed. It would be great to see a Thai win."